ES537753A0 - Perfeccionamientos en los circuitos telefonicos - Google Patents

Perfeccionamientos en los circuitos telefonicos

Info

Publication number
ES537753A0
ES537753A0 ES537753A ES537753A ES537753A0 ES 537753 A0 ES537753 A0 ES 537753A0 ES 537753 A ES537753 A ES 537753A ES 537753 A ES537753 A ES 537753A ES 537753 A0 ES537753 A0 ES 537753A0
Authority
ES
Spain
Prior art keywords
current
sub
circuit
line
telephone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
ES537753A
Other languages
English (en)
Spanish (es)
Other versions
ES8600591A1 (es
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STMicroelectronics SRL
Original Assignee
ATES Componenti Elettronici SpA
SGS ATES Componenti Elettronici SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ATES Componenti Elettronici SpA, SGS ATES Componenti Elettronici SpA filed Critical ATES Componenti Elettronici SpA
Publication of ES8600591A1 publication Critical patent/ES8600591A1/es
Publication of ES537753A0 publication Critical patent/ES537753A0/es
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/026—Arrangements for interrupting the ringing current

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Telephonic Communication Services (AREA)
  • Manipulation Of Pulses (AREA)
  • Noise Elimination (AREA)
  • Telephone Function (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
ES537753A 1983-11-23 1984-11-19 Perfeccionamientos en los circuitos telefonicos Granted ES537753A0 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT8323832A IT1212838B (it) 1983-11-23 1983-11-23 Circuito telefonico, integrabile monoliticamente, per il riconoscimento dello sgancio in fase di suoneria.

Publications (2)

Publication Number Publication Date
ES8600591A1 ES8600591A1 (es) 1985-10-16
ES537753A0 true ES537753A0 (es) 1985-10-16

Family

ID=11210289

Family Applications (1)

Application Number Title Priority Date Filing Date
ES537753A Granted ES537753A0 (es) 1983-11-23 1984-11-19 Perfeccionamientos en los circuitos telefonicos

Country Status (8)

Country Link
US (1) US4677664A (de)
EP (1) EP0143435B1 (de)
JP (1) JPH0710083B2 (de)
AT (1) ATE60967T1 (de)
BR (1) BR8405956A (de)
DE (2) DE143435T1 (de)
ES (1) ES537753A0 (de)
IT (1) IT1212838B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4784435A (en) * 1986-02-26 1988-11-15 Leib Roger K Patient chair
IT1213306B (it) * 1986-07-29 1989-12-20 Sgs Microelettronica Spa Circuito telefonico, integrabile monoliticamente, per l'invio disegnali di suoneria in una linea telefonica d'utente e per il riconoscimento dello sgangio in fase di suoneria.
EP0675629B1 (de) * 1994-03-04 2004-11-24 Infineon Technologies AG Verfahren zur störsicheren Abhebeerkennung bei Rufsignaleinspeisung in digitalen Fernsprechvermittlungseinrichtungen und Schaltungsanordnung zur Durchführung des Verfahrens
JPH08139802A (ja) * 1994-11-10 1996-05-31 Fujitsu Ltd リングトリップ判定回路
US5544241A (en) * 1995-06-27 1996-08-06 Andrew S. Dibner Telephone ring detector

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3829619A (en) * 1972-12-29 1974-08-13 Stromberg Carlson Corp Telephone ring trip circuit
CH604453A5 (de) * 1976-06-25 1978-09-15 Ibm
FR2452832A1 (fr) * 1979-03-30 1980-10-24 Telecommunications Sa Dispositif de commande de sonnerie
FR2470498A1 (fr) * 1979-11-21 1981-05-29 Trt Telecom Radio Electr Dispositif de detection du bouclage d'une ligne d'abonne pendant la sonnerie
IT1128374B (it) * 1980-02-19 1986-05-28 Cselt Centro Studi Lab Telecom Circuito telefonico per la generazione del ritmo di suoneria ed il riconoscimento dello sgancio
US4396805A (en) * 1981-09-21 1983-08-02 Siemens Corporation Ring trip detector for a subscriber line interface circuit
IT1155661B (it) * 1982-03-24 1987-01-28 Cselt Centro Studi Lab Telecom Circuito elettronico per la rivelazione dello sgancio del microtelefono in presenza della corrente di chiamata

Also Published As

Publication number Publication date
DE143435T1 (de) 1987-05-21
ES8600591A1 (es) 1985-10-16
EP0143435A2 (de) 1985-06-05
DE3484121D1 (de) 1991-03-28
EP0143435B1 (de) 1991-02-20
EP0143435A3 (en) 1987-06-16
US4677664A (en) 1987-06-30
IT8323832A0 (it) 1983-11-23
BR8405956A (pt) 1985-09-10
IT1212838B (it) 1989-11-30
ATE60967T1 (de) 1991-03-15
JPH0710083B2 (ja) 1995-02-01
JPS60152161A (ja) 1985-08-10

Similar Documents

Publication Publication Date Title
EP0119422A3 (de) Induktanzsimulator
ES537753A0 (es) Perfeccionamientos en los circuitos telefonicos
MY106186A (en) Image signal average picture level detecting apparatus.
ES8202210A1 (es) Un circuito de manantial de corriente constante estabiliza- da en tension electrica y temperatura
CA2055633A1 (en) Electrical measuring device having two connection configurations
JPS56166612A (en) Level shifting circuit
JPS5637793A (en) Loop detecting circuit
ES8606954A1 (es) Perfeccionamientos en un circuito para mantener el voltaje de corriente continua de una linea electricamente aislada a un nivel de referencia.
ES464223A1 (es) Equipo para linea telefonica.
ATE43468T1 (de) Energiesparende schaltvorrichtung.
JPS5349246A (en) Constant voltage circuit
BR9202108A (pt) Conjunto de circuitos de telefone com circuito detector de desengate
JPS5717207A (en) Amplifying circuit
DE69228407D1 (de) Strombegrenzte Teilnehmerschnittstellenschaltung
JPS5327353A (en) Bipolar digital-analog converter
JPS56166613A (en) Voltage to current converting circuit
FR2324181A1 (fr) Dispositif de detection de boucle d'une ligne d'abonne
GB1531692A (en) Telecommunication substation
JPS547228A (en) Pedestal clamp circuit
JPS54120516A (en) Transmission system for alternating current signal
JPS55124354A (en) Terminal connection system
JPS56122552A (en) Subscriber's terminal circuit
JPS5535261A (en) Wattmeter
JPS5725765A (en) Unbalance-to-balance converting system
JPS56136005A (en) Biasing circuit